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f91a0d3e24
The i_cache was designed to keep references to the indirect blocks used during block mapping so that they didn't have to be looked up continually. The idea failed because there are too many places where the i_cache needs to be freed, and this has in the past been the cause of many bugs. In addition there was no performance benefit being gained since the disk blocks in question were cached anyway. So this patch removes it in order to simplify the code to prepare for other changes which would otherwise have had to add further support for this feature. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
149 lines
3.2 KiB
C
149 lines
3.2 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/lm_interface.h>
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#include <asm/atomic.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "ops_fstype.h"
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#include "sys.h"
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#include "util.h"
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#include "glock.h"
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static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
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{
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struct gfs2_inode *ip = foo;
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inode_init_once(&ip->i_inode);
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spin_lock_init(&ip->i_spin);
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init_rwsem(&ip->i_rw_mutex);
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}
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static void gfs2_init_glock_once(struct kmem_cache *cachep, void *foo)
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{
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struct gfs2_glock *gl = foo;
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INIT_HLIST_NODE(&gl->gl_list);
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spin_lock_init(&gl->gl_spin);
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INIT_LIST_HEAD(&gl->gl_holders);
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INIT_LIST_HEAD(&gl->gl_waiters1);
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INIT_LIST_HEAD(&gl->gl_waiters3);
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gl->gl_lvb = NULL;
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atomic_set(&gl->gl_lvb_count, 0);
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INIT_LIST_HEAD(&gl->gl_reclaim);
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INIT_LIST_HEAD(&gl->gl_ail_list);
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atomic_set(&gl->gl_ail_count, 0);
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}
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/**
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* init_gfs2_fs - Register GFS2 as a filesystem
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*
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* Returns: 0 on success, error code on failure
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*/
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static int __init init_gfs2_fs(void)
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{
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int error;
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error = gfs2_sys_init();
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if (error)
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return error;
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error = gfs2_glock_init();
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if (error)
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goto fail;
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error = -ENOMEM;
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gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
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sizeof(struct gfs2_glock),
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0, 0,
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gfs2_init_glock_once);
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if (!gfs2_glock_cachep)
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goto fail;
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gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
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sizeof(struct gfs2_inode),
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0, SLAB_RECLAIM_ACCOUNT|
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SLAB_MEM_SPREAD,
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gfs2_init_inode_once);
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if (!gfs2_inode_cachep)
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goto fail;
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gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
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sizeof(struct gfs2_bufdata),
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0, 0, NULL);
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if (!gfs2_bufdata_cachep)
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goto fail;
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error = register_filesystem(&gfs2_fs_type);
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if (error)
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goto fail;
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error = register_filesystem(&gfs2meta_fs_type);
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if (error)
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goto fail_unregister;
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gfs2_register_debugfs();
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printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
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return 0;
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fail_unregister:
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unregister_filesystem(&gfs2_fs_type);
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fail:
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gfs2_glock_exit();
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if (gfs2_bufdata_cachep)
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kmem_cache_destroy(gfs2_bufdata_cachep);
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if (gfs2_inode_cachep)
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kmem_cache_destroy(gfs2_inode_cachep);
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if (gfs2_glock_cachep)
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kmem_cache_destroy(gfs2_glock_cachep);
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gfs2_sys_uninit();
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return error;
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}
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/**
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* exit_gfs2_fs - Unregister the file system
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*
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*/
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static void __exit exit_gfs2_fs(void)
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{
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gfs2_glock_exit();
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gfs2_unregister_debugfs();
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unregister_filesystem(&gfs2_fs_type);
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unregister_filesystem(&gfs2meta_fs_type);
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kmem_cache_destroy(gfs2_bufdata_cachep);
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kmem_cache_destroy(gfs2_inode_cachep);
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kmem_cache_destroy(gfs2_glock_cachep);
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gfs2_sys_uninit();
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}
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MODULE_DESCRIPTION("Global File System");
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MODULE_AUTHOR("Red Hat, Inc.");
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MODULE_LICENSE("GPL");
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module_init(init_gfs2_fs);
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module_exit(exit_gfs2_fs);
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